Wonder why Mazda’s MX-30 only has a modest 35.5kWh battery when its competition frequently has more? According to the brand’s European research director Christian Schultze, it’s to help the planet. He told Automotive News that the small pack is “responsibly” sized to have an overall CO2 emission footprint (including manufacturing and energy consumption) comparable to a diesel Mazda 3 hatchback, even after you replace the battery 100,000 miles into ownership. Long-range batteries would be worse for the environment, Schultze claimed, pointing to Mazda’s calculations for long-term CO2 output.